Everyone has a belly button. It’s the small fold of skin that formed in your abdomen after the umbilical cord was clipped at birth. Belly buttons can be concave (innies) or convex (outies). ‌ Most of ...

Medically reviewed by Robert Burakoff, MD Key Takeaways A urachal cyst is a sac of tissue and fluid between the bladder and the belly button, which can sometimes cause discomfort or symptoms if it ...